Db9 Serial Male To 10 Pin Female Jumper Wires Connector Slot Plate Panel Mount Rainbow Rs232 Serial Adapter Cable W/bracket - Pc Hardware Cables & Adapters - AliExpress
Plastic PCB Jumper Box, DB9 Male / Female - DJB9MF
Amazon.com: CableWholesale RS-232 Jumper Box, DB25 Male to DB25 Female : Home & Kitchen